28984661 has 2 divisors, whose sum is σ = 28984662. Its totient is φ = 28984660.

The previous prime is 28984649. The next prime is 28984673. The reversal of 28984661 is 16648982.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (28984649) and next prime (28984673).

It can be written as a sum of positive squares in only one way, i.e., 22146436 + 6838225 = 4706^2 + 2615^2 .

It is a cyclic number.

It is not a de Polignac number, because 28984661 - 2¹⁸ = 28722517 is a prime.

It is a super-2 number, since 2×28984661² = 1680221146569842, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28984691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14492330 + 14492331.

It is an arithmetic number, because the mean of its divisors is an integer number (14492331).

Almost surely, 2^28984661 is an apocalyptic number.

It is an amenable number.

28984661 is a deficient number, since it is larger than the sum of its proper divisors (1).

28984661 is an equidigital number, since it uses as much as digits as its factorization.

28984661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 165888, while the sum is 44.

The square root of 28984661 is about 5383.7404283639. The cubic root of 28984661 is about 307.1775048915.

The spelling of 28984661 in words is "twenty-eight million, nine hundred eighty-four thousand, six hundred sixty-one".